Article View: comp.lang.asm370
Article #633Re: New System/3x0 Instruction
From: Neil Rickert
Date: Sun, 17 Mar 1991 14:01
Date: Sun, 17 Mar 1991 14:01
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1628 bytes
In article <9103171023.AA28323@ucbvax.Berkeley.EDU> you write: >On Sun, 10 Mar 91 13:03:10 -0600, > Neil Rickert <rickert@CS.NIU.EDU> said: >> You can't do that in an instruction. An SVC routine -- yes. An >> instruction -- no. The page tables are not a hardware feature but a >> creation of the operating system. Therefore a hardware instruction >> cannot manipulate them. > >Really? Ever heard of the MVS assists "OBTAIN LOCAL LOCK", "ADD FRR", >etc.? These are (microcoded) instructions which are sensitive to the >format of MVS control blocks. Look in the MVS Data Areas manual (or Sure they are. But they are not considered System/3x0 instructions, and are not documented in Principles of Operation. Rather they are considered part of a microcode assist for MVS. -- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Neil W. Rickert, Computer Science <rickert@cs.niu.edu> Northern Illinois Univ. DeKalb, IL 60115 +1-815-753-6940
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From: rickert@CS.NIU.EDU (Neil Rickert)
Newsgroups: comp.lang.asm370
Subject: Re: New System/3x0 Instruction
Message-ID: <9103171404.AA01042@ucbvax.Berkeley.EDU>
Date: 17 Mar 91 14:01:40 GMT
References: <9103171023.AA28323@ucbvax.Berkeley.EDU>
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